The Launch Equipment Shop (LES) at Kennedy Space Center, part of NASA's famed Vehicle Assembly Budding complex, has conducted highly specialized manufacturing fabrication, and assembly work for the space program since the early 1960s. Leaks from an underground storage tank (UST) led to notable fuel oil contamination of soil and groundwater, including a layer of light non-aqueous phase liquid (LNAPLt up to 14' thick « some areas Total recoverable petroleum hydrocarbon (TRPH) levels were as high as 20.000 parts per million (ppm) in soil and 42 ppm in groundwater The leaking UST was decommissioned and removed with minimal soil excavation due to the presence of sensitive subsurface infrastructure including communication lines As a result, highly impacted soil remained in place Although excavation was identified as the preferred treatment approach, the cost of removing the hard-to-reach soils was prohibitive at over $1 million As a result, alternative approaches were sought to treat the high concentrations of TRPH n soil and groundwater without damaging the sensitive underground infrastructure In particular, In-situ chemical oxidation (ISCO) was considered however, most conventional ISCO chemistries were ruled out due to their corrosive characteristic and tendency to generate excessive heat and/or reactive pressure ISCO using RegenOx - a strong but safer oxidant was chosen for use. as it would not damage the subsurface unities and was significantly more cost-effective than excavation.

Remediation Technology & ObjectivesRegenOx is a powerful yet non-corrosive, low-temperature and low-pressure chemical oxidation technology. It's applied as a two-part formula which includes an alkaline oxidizer and a liquid activator When combined they produce a cascade of chemical oxidation reactions that effectively destroy a wide range of contaminants without posing destructive risks to subsurface infrastructure such as piping. utility and fiber-optic communication lines

The focus of the treatment was to eliminate the potential for free product reoccurrence by targeting soil TRPH contamination exceeding 5.000 ppm. An aggressive ejection approach was designed to apply RegenOx on a monthly basis for a period of 9 months.

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